Quaternary (system)的用法和樣例：
例句
- The Quaternary system in Hanjiang delta is formed by delta sedimentation which is mainly controlled by river trasportation.
韓江三角洲第四系是以河流搬運為主而形成的三角洲相沉積物。 - Previous research has concluded that biogenic gas of the Sanhu region is generated from Quaternary humic source rock.
在以前的研究中柴達木盆地三湖地區生物氣一直被認為是完全由第四系腐殖型有機質所生成的。
